{"id":77062,"date":"2025-09-15T22:49:21","date_gmt":"2025-09-16T03:49:21","guid":{"rendered":"https:\/\/www.emanualonline.com\/blog\/?p=77062"},"modified":"2025-09-15T22:49:21","modified_gmt":"2025-09-16T03:49:21","slug":"p0355-obd2-ignition-coil-e-circuit-malfunction","status":"publish","type":"post","link":"https:\/\/www.emanualonline.com\/blog\/p0355-obd2-ignition-coil-e-circuit-malfunction","title":{"rendered":"P0355 OBD2: Ignition Coil &#8220;E&#8221; Circuit Malfunction"},"content":{"rendered":"<h2>What Does the P0355 Code Mean?<\/h2>\n<p>The P0355 code is a diagnostic trouble code (DTC) that indicates a malfunction in the ignition coil &#8220;E&#8221; primary or secondary circuit. This code signifies that the vehicle&#8217;s Powertrain Control Module (PCM) has detected an electrical issue affecting the ignition coil&#8217;s operation.<\/p>\n<h2>What Causes the P0355 Code?<\/h2>\n<p>Several factors can trigger the P0355 code:<\/p>\n<ul>\n<li>Defective Ignition Coil(s)<\/li>\n<li>Defective Spark Plug(s)<\/li>\n<li>Intake Manifold Vacuum Leaks<\/li>\n<li>Carbon Buildup in the Throttle Body Air Passages<\/li>\n<li>Defective Idle Air Control Valve or Electronic Throttle Body<\/li>\n<\/ul>\n<h2>What Are the Symptoms of the P0355 Code?<\/h2>\n<p>Common symptoms associated with the P0355 code include:<\/p>\n<ul>\n<li>Check Engine Light will illuminate<\/li>\n<li>Engine idles roughly<\/li>\n<li>Engine misfires on acceleration<\/li>\n<li>In rare cases, the engine may not exhibit noticeable symptoms<\/li>\n<\/ul>\n<h2>How Serious Is the P0355 Code?<\/h2>\n<p>The P0355 code is considered urgent and should be addressed immediately. Ignoring this code can lead to severe damage to the vehicle&#8217;s engine and may pose safety risks to the driver and passengers.<\/p>\n<h2>How to Diagnose the P0355 Code<\/h2>\n<p>To accurately diagnose the P0355 code, follow these steps:<\/p>\n<ol>\n<li>Record the freeze frame data and conditions under which the code was triggered.<\/li>\n<li>Perform a test drive while monitoring engine load, throttle position, RPM, and road speed.<\/li>\n<li>Use a data streaming scanner to check for misfire PID information.<\/li>\n<li>Verify the steadiness of the crank signal.<\/li>\n<li>If applicable, switch the entire coil and spark plug assembly with a known good cylinder and retest.<\/li>\n<li>Conduct a compression test on any offending cylinder and check for vacuum leaks.<\/li>\n<li>Inspect the connectors and wiring for the ignition coil circuit.<\/li>\n<li>If necessary, test the coil firing signal using a labscope.<\/li>\n<\/ol>\n<h2>Common Repairs for the P0355 Code<\/h2>\n<p>Common repairs that may resolve the P0355 code include:<\/p>\n<ul>\n<li>Replacing defective ignition coils<\/li>\n<li>Replacing worn or damaged spark plugs<\/li>\n<li>Repairing vacuum leaks in the intake manifold<\/li>\n<li>Cleaning carbon buildup in the throttle body<\/li>\n<li>Replacing faulty sensors or control components associated with the ignition system<\/li>\n<\/ul>\n<h2>How Much Does It Cost to Fix the P0355 Code?<\/h2>\n<p>The cost to fix the P0355 code can vary based on the underlying issue. On average, repairs can range from $100 to $500, depending on whether parts need to be replaced or if additional diagnostics are required.<\/p>\n<h2>Can I Fix the P0355 Code Myself?<\/h2>\n<p>While some experienced DIYers may be able to address the P0355 code themselves, it is crucial to have a thorough understanding of automotive diagnostics and repair. If you are unsure or lack the necessary tools, it is best to seek professional assistance to avoid further complications.<\/p>\n","protected":false},"excerpt":{"rendered":"<p>What Does the P0355 Code Mean? The P0355 code is a diagnostic trouble code (DTC) that indicates a malfunction in the ignition coil &#8220;E&#8221; primary or secondary circuit. This code signifies that the vehicle&#8217;s Powertrain Control Module (PCM) has detected an electrical issue affecting the ignition coil&#8217;s operation. What Causes the P0355 Code? Several factors &hellip;<\/p>\n","protected":false},"author":26,"featured_media":96645,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"om_disable_all_campaigns":false,"_uag_custom_page_level_css":"","footnotes":""},"categories":[11987],"tags":[],"class_list":["post-77062","post","type-post","status-publish","format-standard","has-post-thumbnail","","category-p-obd2-codes-powertrain"],"yoast_head":"<!-- This site is optimized with the Yoast SEO Premium plugin v22.6 (Yoast SEO v26.0) - https:\/\/yoast.com\/wordpress\/plugins\/seo\/ -->\n<title>OBD2 Code P0355 \u2013 Causes, Symptoms, and Repairs<\/title>\n<meta name=\"description\" content=\"Learn all about the P0355 code, what causes ignition coil &quot;E&quot; circuit malfunction, and how to diagnose and fix common issues to maintain optimal engine performance.\" \/>\n<meta name=\"robots\" content=\"index, follow, max-snippet:-1, max-image-preview:large, max-video-preview:-1\" \/>\n<link rel=\"canonical\" href=\"https:\/\/www.emanualonline.com\/blog\/p0355-obd2-ignition-coil-e-circuit-malfunction\" \/>\n<meta property=\"og:locale\" content=\"en_US\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"P0355 OBD2: Ignition Coil &quot;E&quot; Circuit Malfunction\" \/>\n<meta property=\"og:description\" content=\"What Does the P0355 Code Mean? The P0355 code is a diagnostic trouble code (DTC) that indicates a malfunction in the ignition coil &quot;E&quot; primary or\" \/>\n<meta property=\"og:url\" content=\"https:\/\/www.emanualonline.com\/blog\/p0355-obd2-ignition-coil-e-circuit-malfunction\" \/>\n<meta property=\"og:site_name\" content=\"eManualOnline Blog\" \/>\n<meta property=\"article:publisher\" content=\"https:\/\/www.facebook.com\/EmanualOnline\/\" \/>\n<meta property=\"article:author\" content=\"https:\/\/www.facebook.com\/jee514\" \/>\n<meta property=\"article:published_time\" content=\"2025-09-16T03:49:21+00:00\" \/>\n<meta property=\"og:image\" content=\"https:\/\/www.emanualonline.com\/blog\/wp-content\/uploads\/2025\/09\/p0355-obd2-ignition-coil-e-circuit-malfunction.png\" \/>\n\t<meta property=\"og:image:width\" content=\"1200\" \/>\n\t<meta property=\"og:image:height\" content=\"675\" \/>\n\t<meta property=\"og:image:type\" content=\"image\/png\" \/>\n<meta name=\"author\" content=\"JC Landry\" \/>\n<meta name=\"twitter:card\" content=\"summary_large_image\" \/>\n<meta name=\"twitter:creator\" content=\"@eManualOnline\" \/>\n<meta name=\"twitter:site\" content=\"@eManualOnline\" \/>\n<meta name=\"twitter:label1\" content=\"Written by\" \/>\n\t<meta name=\"twitter:data1\" content=\"JC Landry\" \/>\n\t<meta name=\"twitter:label2\" content=\"Est. reading time\" \/>\n\t<meta name=\"twitter:data2\" content=\"2 minutes\" \/>\n<script type=\"application\/ld+json\" class=\"yoast-schema-graph\">{\"@context\":\"https:\/\/schema.org\",\"@graph\":[{\"@type\":\"Article\",\"@id\":\"https:\/\/www.emanualonline.com\/blog\/p0355-obd2-ignition-coil-e-circuit-malfunction#article\",\"isPartOf\":{\"@id\":\"https:\/\/www.emanualonline.com\/blog\/p0355-obd2-ignition-coil-e-circuit-malfunction\"},\"author\":{\"name\":\"JC Landry\",\"@id\":\"https:\/\/www.emanualonline.com\/blog\/#\/schema\/person\/e803434ab3cc70008b22b56253223403\"},\"headline\":\"P0355 OBD2: Ignition Coil &#8220;E&#8221; 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The P0355 code is a diagnostic trouble code (DTC) that indicates a malfunction in the ignition coil &#8220;E&#8221; primary or secondary circuit. This code signifies that the vehicle&#8217;s Powertrain Control Module (PCM) has detected an electrical issue affecting the ignition coil&#8217;s operation. What Causes the P0355 Code? Several factors&hellip;","_links":{"self":[{"href":"https:\/\/www.emanualonline.com\/blog\/wp-json\/wp\/v2\/posts\/77062","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/www.emanualonline.com\/blog\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/www.emanualonline.com\/blog\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/www.emanualonline.com\/blog\/wp-json\/wp\/v2\/users\/26"}],"replies":[{"embeddable":true,"href":"https:\/\/www.emanualonline.com\/blog\/wp-json\/wp\/v2\/comments?post=77062"}],"version-history":[{"count":1,"href":"https:\/\/www.emanualonline.com\/blog\/wp-json\/wp\/v2\/posts\/77062\/revisions"}],"predecessor-version":[{"id":83761,"href":"https:\/\/www.emanualonline.com\/blog\/wp-json\/wp\/v2\/posts\/77062\/revisions\/83761"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/www.emanualonline.com\/blog\/wp-json\/wp\/v2\/media\/96645"}],"wp:attachment":[{"href":"https:\/\/www.emanualonline.com\/blog\/wp-json\/wp\/v2\/media?parent=77062"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.emanualonline.com\/blog\/wp-json\/wp\/v2\/categories?post=77062"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.emanualonline.com\/blog\/wp-json\/wp\/v2\/tags?post=77062"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}